<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
    <script type="text/javascript">
    function tulin(say){
      switch (say){
        case'土豆':
        console.log('呦');
        break;
        case '呦':
        console.log('切克闹');
        break;
        default:
      }
    }
    tulin('土豆');
    tulin('呦');
    </script>
  </body>
</html>
